You're welcome, your game was really fun !
I never actually played Terraforming Mars, but I think I get what you mean about the end game. I loved your idea of being sacrificed in a party at the end of the game, it seems like a fun way to loose thematically ! I hope it could have a more significant impact on the gameplay in the future.
Can't wait to see what you will be doing with the board, I'm sure you're on the right track !
About the printer friendly aspect, I was thinking about the main cards and the rules which could be a bit lighter and black and white to save some ink (see below). I love the aspect of the cards as you made them, but it would be nice to also have a cheaper option, especially with that big deck of cards.
Good luck with your design !